105 citations · 333 across the 9 of their papers we have counts for
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Low energy theory of the t-t'-t''-U Hubbard Model at half-filling: interaction strengths in cuprate superconductors and an effective spin-only description of La_2CuO_4
J. -Y. P. Delannoy, M. J. P. Gingras, P. C. W. Holdsworth +1
Spin-only descriptions of the half-filled one-band Hubbard model are relevant for a wide range of Mott insulators. In addition to the usual Heisenberg exchange, many new types of i…
Ground state and low-lying excitations of the spin-1/2 XXZ model on the kagome lattice at magnetization 1/3
A. Honecker, D. C. Cabra, M. D. Grynberg +5
We study the ground state and low-lying excitations of the S=1/2 XXZ antiferromagnet on the kagome lattice at magnetization one third of the saturation. An exponential number of no…
Neel order, ring exchange and charge fluctuations in the half-filled Hubbard model
J. -Y. P. Delannoy, M. J. P. Gingras, P. C. W. Holdsworth +1
We investigate the ground state properties of the two dimensional half-filled one band Hubbard model in the strong (large-U) to intermediate coupling limit ({\it i.e.} away from th…
Quantum kagome antiferromagnet in a magnetic field: Low-lying non-magnetic excitations versus valence-bond crystal order
D. C. Cabra, M. D. Grynberg, P. C. W. Holdsworth +5
We study the ground state properties of a quantum antiferromagnet on the kagome lattice in the presence of a magnetic field, paying particular attention to the stability of the pla…
From classical to quantum Kagome antiferromagnet in a magnetic field
D. C. Cabra, M. D. Grynberg, P. C. W. Holdsworth +1
We study the magnetic properties of the Kagome antiferromagnet going from the classical limit to the deep quantum regime of spin 1/2 systems. In all the cases there are special val…